Lennox 78H40 Expansion Valve Freon Diagnostic Test Switch: Allows technicians

Diagnostic Test Switch: Allows technicians to verify internal relay functionality and safety circuit interruption instantly

the silicon carbide element provides a stable heat source to energize the main burner without the risk of delayed ignition

The Copeland 998-E022-01 POE Oil is a professional-grade polyol ester refrigeration oil specifically formulated for use in Copeland compressors

093 female socket terminal for an airtight electrical interface

5 SCFM at 15 psig

Lennox 78H40 Expansion Valve Freon Diagnostic Test Switch: Allows techniciansThe Lennox 78H40 Expansion Valve is a critical 6 ton thermostatic expansion valve (TXV) engineered for precise refrigerant metering in high capacity light commercial and residential cooling systems. As a veteran grade HVAC replacement part, the 78H40 (identical to Lennox 78H4001) regulates refrigerant flow into the evaporator coil by sensing heat load changes, preventing liquid slugging and ensuring the compressor receives superheated vapor. This TXV